2015 No. 11

Publish Date:2015-11-06
ISSN:0258-7998
CN:11-2305/TN
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The discussion on evaluation index and the assessment method of intelligent manufacturing

DOI:10.16157/j.issn.0258-7998.2015.11.001

Author:Gong Bingzheng

Author Affilications:The Sixth Electronic Research Institute of China Electronics CEC,Beijing 100083,China

Abstract:This paper analyzes the significance of Evaluation Index and the Assessment Method of Intelligent manufacturing,discusses the evaluation model, index and assessment method of intelligent manufacturing.
Key word:
intelligent manufacturing
evaluation model
evaluation index
assessment method

YKS5132J CNC gear shaping machine special control functions of design and implementation

DOI:10.16157/j.issn.0258-7998.2015.11.002

Author:Li Tao,Zhang Wei,Huang Shuai

Author Affilications:Yichang Changji Machine Technology Co.,LTD,Yichang 443003,China

Abstract:In order to meet the needs of customers YKS5132J CNC Gear Shaper Machine special electrical control functions, the special function of the customers demand has carried on the detailed analysis and research. By increasing the SMC rotating cylinder, a special automatic cycle hand dial switch, to prevent wrong operation safety light curtain, automatic control of the pneumatic solenoid valve, sensor detection approach switch and other spare parts on the general YKS5132J machine. And changed the part of the electrical control design process, modified the Siemens 808D CNC system of machine data parameters, increased the PLC code and optimized machining code, completed the design requirements, realized the functional requirements which proposed by the customer.
Key word:
YKS5132J
CNC gear shaping machine
electrical design
Siemens 808D

Design and application of the stepper motor control system

DOI:10.16157/j.issn.0258-7998.2015.11.003

Author:Ma Wenbin,Yang Yanzhu,Hong Yun

Author Affilications:College of Mechanical Engineering,Donghua University,Shanghai 201620,China

Abstract: Stepping motor control system based on DSP adopts the closed-loop control method, at the same time with the photoelectric encoder feedback signal, and the application of special high power drive chip THB664H peripheral hardware circuit not only simplifies the system structure, and enhance the system reliability and anti-interference ability, and according to the actual engineering problems arising from the analysis and the concrete solving measures are put forward .Part of the software and hardware design and the system has carried on the brief introduction of the peripheral circuit, based on the real-time control of stepping motor displacement implements in CNC machine tool feed tracking quickly and to DSP in the control system of the stepper motor to provide reference for further development and application.
Key word:
stepper motor
closed loop
feedback
DSP

Uncalibrated visual servoing based on human simulated intelligent controller

DOI:10.16157/j.issn.0258-7998.2015.11.004

Author:Gong Fei,Xie Ming,Wang Mengjia,Zhu Yingying

Author Affilications:College of Automation and Electrical Engineering,Nanjing University of Technology,Nanjing 211816,China

Abstract: In this paper, we design a humanoid intelligent controller with uncalibrated visual servoing, the simulation of the five degree of freedom motion of the robot arm is accomplished with the uncalibrated of the binocular vision. We choose point feature as the feature of the binocular vision image, and design the visual feature model and the multi mode visual servo controller, and the visual simulation experiment of the five degree of freedom motion space is conducted under the Matlab platform, we demonstrate the effectiveness of the method.
Key word:
uncalibrated
binocular vision
humanoid intelligent control
Matlab

Review and Comment

Survey of high efficiency and linearity of CMOS power amplifiers

DOI:10.16157/j.issn.0258-7998.2015.11.005

Author:Lin Junming,Zheng Yaohua,Zhang Zhihao,Zhang Guohao

Author Affilications:School of Information Engineering, Guangdong University of Technology, Guangzhou 510006,China

Abstract:CMOS process is the ideal solution for monolithic integrated circuit in terms of low cost and compatibility for baseband circuitries. Based upon the requirements applied for specific modulation scheme of modern communication systems, the purpose of this paper is to present the state of the art of the techniques of which the benefits and drawbacks are compared, to enhance the efficiency and linearity of power amplifiers(PAs). In addition, the developing trend of enveloping tracking power amplifiers(ET PAs) applied for LTE applications is presented.
Key word:
power amplifier
efficiency
linearity
LTE
CMOS
envelope tracking

Embedded Technology

Multi-Channel IIR filter design based on FPGA

DOI:10.16157/j.issn.0258-7998.2015.11.006

Author:Peng Hao1,Huang Junxiong2,Jiang Xianyang3,Chang Sheng1

Author Affilications:1.School of Physics and Technology, Wuhan University,Wuhan 430072,China; 2.Electronic Information School, Wuhan University,Wuhan 430072,China; 3.GNSS Engineering Research Center, Wuhan University,Wuhan 430072,China

Abstract: Filter is one of the most important components adopted in audio signal process system. Specifically, along with the development of the multimedia and entertainment technology, high-precision audio signals are widely used, and multi-channel is one of significant requirements for audio signal process. Driven by this strong application requirement, a scalable multi-channel IIR digital filter is proposed. By analyzing the frequency spectrum, this filter is proven to satisfy the design requirements.
Key word:
FPGA
IIR digital filter
multi-channel
time division multiplexing
audio signal processing

The study and implementation of porting MQXLite RTOS to ARM Cortex-M0+/M4

DOI:10.16157/j.issn.0258-7998.2015.11.007

Author:Wang Lei,Wang Yihuai,Yao Wangshu,Fan Ningning

Author Affilications:College of Computer Science and Technology,Soochow University,Suzhou 215006,China

Abstract:Base on the analysis of MQXLite organization structure, a general project framework template for MQXLite is introduced, which targets MQXLite’s limited device support issue caused by the overreliance of Processor Expert(PE). This template helps porting MQXLite to an ARM Cortex-M0+/M4 chip, and the porting process including startup process, interrupt system, system timer and application task is also elaborately introduced. At last, two porting tests are conducted on two chips: KW01 and CC3200, which have different cores and vendors. The test result shows the portability and universality of this template framework.
Key word:
MQXLite
ARM Cortex-M0+/M4
RTOS porting
general project template

Design and implementation of SCA based on ZedBoard

DOI:10.16157/j.issn.0258-7998.2015.11.008

Author:Yuan Yang1,Tan Yuehui1,Sun Huixian1,Shen Ruoxi2,Zhou Han3

Author Affilications:1.Department of Information Engineering,Ordnance Engineering College,Shijiazhuang 050000,China; 2.General Equipment Department of Chongqing army of Kunming area,Kunming 650000,China; 3.Chongqing Military Deputy Bureau of General Armament Department,Chongqi 400060,China

Abstract: ZedBoard is the first All Programmable System on Chip(SOC) integrating with the ARM Cortex A9 and 7 Series FPGA developed by Xilinx, which is one of the best embedded platforms of the implementation of the miniaturized Software Communications Architecure(SCA). The hardware structure of ZedBoard platform is introduced in this paper, and aiming at the problem that SCA could not achieve on the special hardware platform, the Modem Hardware Abstration Layer(MHAL) hardware abstraction interface and FPGA waveform component container are designed with the research of the MHAL and the technology, which effectively solves the implementation issues of the SCA architecture on ZedBoard, and plays the foundation for the system development with the core of SCA on ZedBoard.
Key word:
SCA
ZedBoard
MHAL
OCP

Design of data encryption and storage system based on domestic SOC

DOI:10.16157/j.issn.0258-7998.2015.11.009

Author:Wang Shanming,Yan Yingjian,Guo Pengfei,Ma Zhengyu

Author Affilications:PLA Information Engineering University,Zhengzhou 450001,China

Abstract:Refering to more and more serious security problems of data and information,this paper proposes a file encryption system as follows: the SOC chip HX6801 developed by our unit as core; the SD card as storage; the DS3231 chip as RTC provider; the FatFs as file system. Achieving data encryption and storage by programming integrated cryptographic coprocessors and domestic embedded CPU. The system takes full advantage of HX6801 cryptographic processing capability and peripheral expansion capability, this system architecture is simple and efficiency.
Key word:
domestic SOC
SD card
FafFs
DS3231
encryption/decryption

Design of disaster scene information real-time collection system

DOI:10.16157/j.issn.0258-7998.2015.11.010

Author:Li Zeng

Author Affilications:The Armed Police Academy,Langfang 065000,China

Abstract: In order to protect the firefighters working on disaster scene,the system of information collection and transmission based on Android terminal is designed, which including single wearable sensor terminal, data servers and portable command platform. As a result, information of life parameter of firefighters, temperature ,consistence of toxic gas are transmit to command center and commander on site real-time and uninterrupted, providing an important decision-making reason,and the level of automation of command is improved.
Key word:
disaster
information
collection
fire
transmission

Design of airborne inertial stabilization camera platform based on AVR microcontroller

DOI:10.16157/j.issn.0258-7998.2015.11.011

Author:An Henan,Chen Yang,Zhang Jun,Pan Jiaojiao

Author Affilications:College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060,China

Abstract: Aiming at the shortcomings and deficiencies that existed in multirotor UAV aerial photography system, whose camera will be shaking if the UAV has to change the flight attitude, an airborne inertial stabilization camera platform based on AVR microcontroller and MEMS gyro is designed. The system uses Kalman filtered gyro output data to monitor and judge the change of angular velocity in the three axes of the UAV, drives the stepper motors to adjust the attitude of the camera platform, and finally achieve the system, so that the pictures captured by the camera upon the platform are stable all the time. The experimental results show that the system is stable, reliable and well-performanced.
Key word:
microcontroller
gyro
Kalman filtering
inertial stabilization platform
UAV
camera platform

Microelectronic Technology

Amplifying filter circuit design for interference signal of photoelastic modulated interferometer

DOI:10.16157/j.issn.0258-7998.2015.11.012

Author:Kang Shuai1,Wang Zhibin1,2,Zhang Minjuan1,Chen Youhua1,Li Kewu1

Author Affilications:1.Shanxi Provincal Research Center for Opto-electronic Information and Instrument Enginering Technology, North University of China,Taiyuan 030051,China; 2.Science and Technology on Electronic Test & Measurement Laboratory,North University of China,Taiyuan 030051,China

Abstract: The interference light come out from the photolastic modulation interference which is received by the detector and then exported signal is a high frequency , it is about tens of millivolts and susceptible to be interfered by noise. It is essential for the spectral inversion of Fourier transform spectrometer if we can detect and extract it and amplify to the range of high-speed AD acquisition signal which is 600 mV to 4 V bomb on the subsequent optical modulator effectively. Therefore, we need to design a two-stage amplification circuit of high frequency, high-gain and low-noise. It is mainly composed of DC power supply circuit, small signal amplification circuit and a low-pass passive filter circuit which has a cutoff frequency of 50 MHz. The experimental results show that the amplification filter circuit can amplify the input photoelastic signal to 150 times or so steadily, which can provide good signal for subsequential collection and storage.
Key word:
elastic light modulator
inversion spectrum
DC power supply
small signal amplification
low pass filter

Design and realization of the control symbols module based on RapidIO specification

DOI:10.16157/j.issn.0258-7998.2015.11.013

Author:Feng Longhui1,Zhang Xingming1,Yang Zhenxi1,Li Peijie1,Wang Xin2

Author Affilications:National Digital Switching System Engineering Technological Research Center,Zhengzhou 450002,China

Abstract: This paper designs and realizes the control symbols module based on the RapidIO_2.2 specification. Using the method of pipeline, the control symbol is decomposed and created according to the functions of different fields, which can be combined parallelly in the end. The simulation results show that under the RapidIO_2.2 specification our design can create the right control symbols rapidly, and can also create different control symbols continuously.
Key word:
RapidIO
control symbols
pipeline
parallel

An ultra-low quiescent current LDO

DOI:10.16157/j.issn.0258-7998.2015.11.014

Author:Liu Bo1,2,Liu Xin3,Fan Xiaohua3,Yang Jun1,3,Zhang Haiying3

Author Affilications:1.Nanjing CSM-IC Microelectronics Inc.,Nanjing 210046,China; 2.University of Chinese Academy of Sciences,Beijing 100049,China; 3.Institute of Microelectronics of Chinese Academy of Sciences,Beijing 100029,China

Abstract: A low voltage low dropout regulator(LDO) is presented, which utilizes the proposed operational transconductance amplifier working in the subthreshold region to achieve ultra-low quiescent current, thus contributing to a low power consumption and a high efficiency. The proposed LDO is designed in a 0.35 μm standard CMOS process, and the whole circuit occupies an area of 0.8 mm2,dissipating a quiescent current flow of 500 nA at typical working condition as well as delivering a largest current of 150 mA at full-load condition. The circuit is operable with the input voltage ranging from 3.3 V to 5 V,and the output voltage is 3 V.
Key word:
LDO
ultra-low quiescent current
operational transconductance amplifier
subthreshold

Design of wide-band LC VCO with low phase noise

DOI:10.16157/j.issn.0258-7998.2015.11.015

Author:Tang Xuefeng

Author Affilications:Huzhou University,School of Information Engineering,Huzhou 313000,China

Abstract: This paper presents a wide-band LC VCO with low phase noise based on 0.13 μm CMOS process. Switched capacitor array is included in this VCO that simultaneously achieve very wide tuning range and low phase noise performance. MOS varactor array is used in this VCO to linearize its frequency-voltage characteristic. The VCO consumes 3 mA from a 1.2 V supply. It operates with a wide frequency band from 4.58 GHz-5.35 GHz. The center frequency is 5 GHz and the measured phase noise is -125 dBc/Hz at 1 MHz offset.
Key word:
voltage-controlled oscillator
switched capacitor array
varactor array

The variable FIR filter implement based on FPGA CFGLUT5

DOI:10.16157/j.issn.0258-7998.2015.11.016

Author:Zhu Shuwei1,Huang Ruimin1,Yang Qinghe2

Author Affilications:1.College of Information Science and Engineering,Huaqiao University,Xiamen 361021,China; 2.Mai Wei Communication Technology Incorporated Company,Quanzhou 362000,China

Abstract: In order to realize the variable coefficient FIR filter this paper uses a distributed arithmetic architectural 31st-order variable FIR filter as basic example, exploits the dynamic configuration capabilities of FPGA reconfigurable unit-CFGLUT5 to achieve the reusable structure sharing, thus reduce resource consumption and improve variable filter hardware efficiency, the proposed variable FIR filter structure was implemented and verified by using Xilinx Spartan6 devices, the results show that the proposed structure can meet the performance of operation-mode switching while reducing the footprint of about 25 times (LUT) and distinguished improve the speed of the system.
Key word:
FIR filter
CFGLUT5
lockup talbe
distributed arithmetic

VLSI design and implementation of pre-coding and resource mapping for TD-LTE system

DOI:10.16157/j.issn.0258-7998.2015.11.017

Author:Sun Lu,Zhang Ruiqi,Wu Bin

Author Affilications:Institute of Microelectronics of Chinese Academy of Science, Beijing 100029,China

Abstract:In this paper, a novel spatial multiplexing pre-coding and resource mapping module is designed for serial implementation architecture of downlink TD-LTE system with double code words and dual-antenna. The traditional spatial multiplexing pre-coding module can’t process two code words in different time serially. Therefore, a buffer is needed before pre-coding processing, which leads to extra memory overhead of the system. By transferring the coefficient matrix of the spatial multiplexing pre-coding, the addition operation of two code words is removed in order to make the pre-coding module capable to process two code words in different time serially. Besides, according to the features of resource mapping module, the addition operation of two code words is transplanted from the spatial multiplexing pre-coding module and a new way to multiplexing memory is put forward, which can save the buffer mentioned before and reduce the memory overhead in the two modules by 16.4%. The experimental results show that, compared to the same type of design,the novel spatial multiplexing pre-coding and resource mapping module in this paper have the advantages of simple control and low hardware cost.
Key word:
pre-coding
resource mapping
spatial multiplexing
TD-LTE

Measurement Control Technology and Instruments

Design of anti-crosstalk circuit on satellite multichannel telemetry switch

DOI:10.16157/j.issn.0258-7998.2015.11.018

Author:Wang Junqi,Zhu Zhenhua,Wang Tianliang

Author Affilications:Shanghai Institute of Satellite Engineering,Shanghai 200240,China

Abstract:Design of anti-crosstalk circuit is used to optimize the cascaded switches, and the design will solve the problem of crosstalk among the multichannel telemetry which was brought by the first level multi-switch. Design of anti-crosstalk circuit is also used to optimize the analog measurement output interface which is the operational amplifier circuit, and the design will reduce crosstalk voltage among the transmission lines of the analog measurements.
Key word:
satellite telemetry
telemetry switch
anti crosstalk
transmission line

Design of image capture and storage system based on FPGA

DOI:10.16157/j.issn.0258-7998.2015.11.019

Author:Wei Liling1,2,Zhu Ping1,2,Shi Yongliang1,2

Author Affilications:1.Science and Technology on Electronic Test & Measurement Laboratory,North University of China,Taiyuan 030051,China; 2.School Instrument and Electronics,North University of China,Taiyuan 030051,China

Abstract:A kind of test system which has function of storage, collection and long-term backward read to image is designed in this paper. The system stores high-capacity image data into FLASH chip. After the image data storage finishing, in order to read module backward read to control computer to save and decode through LVDS bus way. Experiments show that this system has high stability, it has reference significance in the field of industrial control.
Key word:
image data
FPGA
Flash
data storage

Research of microseism information acquisition system based on FPGA

DOI:10.16157/j.issn.0258-7998.2015.11.020

Author:Li Liangguang,Yu Fangfang,Cao Lingling,Zhao Shuchang

Author Affilications:College of Electric and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China

Abstract: According to the process of coal mining on geological disaster prevention technical barriers, a mine microseismic monitoring system based on FPGA is proposed in this paper. Microseismic signal acquisition system designed in this paper, taking FPGA as the core processor, amplification, filtering microseismic signal and so on. Among them, the signal amplification factor is configurable according to different environment. The system uses FPGA as the core processing module; system increases the ping-pong cache module and digital filter module, speed up the processing of the data and improves the accuracy of data processing. Microseismic signal through the Ethernet transmission, reduce the bit error rate, and realizes remote monitoring. Finally, several acquisition channels of the system are chosen for experiment, and the experimental results show the feasibility of the scheme.
Key word:
microseismic
signal acquisition
digit filter
Ethernet transmission

Design of supervision system at the nuclear material research and application

DOI:10.16157/j.issn.0258-7998.2015.11.021

Author:Wang Changqing1,2,Cao Yuan1

Author Affilications:1.School of Physics and Electronic Engineering, Henan Normal University,Xinxiang 453007,China; 2.Henan Key Discipline Open Laboratory of Electromagnetic Wave Detecting, Henan Normal University,Xinxiang 453007,China

Abstract: A design of nuclear material monitoring system based on ZigBee is introduced in this paper, the system can be aided scientific research departments for nuclear material in the application and reserch process of theft, accidental leaks, regional warning and other issues for real-time monitoring; multinode coorperative work and the surrounding environment of researchers are monitoring and warning area, to ensure the safety of staff. The signal strength indicator RSSI was used to determine the warning area of the nuclear material, reduce the load, not depend on the reference node set and enhance the flexibility of the system. The test results show that the system is reliable and has good real-time performance, and can meet the application requirements in the acceptable range.
Key word:
ZigBee
application reserch
theft
leaks
RSSI

Radar image compress and transfer system based on ADV212

DOI:10.16157/j.issn.0258-7998.2015.11.022

Author:Qi Zhiheng1,Jiang Zhe2,Zhang Wei1

Author Affilications:1.School of Electronic Information Engineering,Tianjin University,Tianjin 300072,China; 2.College of Engineering,Peking University,Beijing 100871,China

Abstract: A radar image compress and transfer system based on ADV212 and FPGA is designed to process the data of radar,which has 4 096 quantization levels of orientation and 4 096 quantization levels of distance. Time cost form compression to transfer decreases because a new method of radar image compression is proposed, the radar image is devided into tiles and each tile is compressed respectively, and the ping-pang buffer strategy is used. The compression ratio of the system and the image resolution are configurable. ADV212 is used to compress the image, compressed data is sent to network by W5500, and other modules is implemented in FPGA. The experiments show that the system meets the requirement of real-time radar image processing.
Key word:
radar image
ADV212
JPEG2000
compress by tiles
transfer

Development of finger vein image acquisition system based on FPGA

DOI:10.16157/j.issn.0258-7998.2015.11.023

Author:Yu Chengbo,Yu Yujie,Fang Jun,Deng Shunhua

Author Affilications:Institute of Remote Test and Control, Chongqing University of Technology, Chongqing 400054,China

Abstract: Analyses the finger vein imaging principle and develops a finger vein acquisition system based on FPGA. The system is made up of the finger vein image acquisition device, image acquisition module, image cache control module and LCD display control module. The experimental results shows that the finger vein image acquisition system that uses near-infrared light source module with wavelength of 850 nm, MT9V034 camera, VIP_Board Full FPGA development board and 5.0 inch TFT LCD display screen has small volume, strong real-time acquisition, showing the finger vein image texture clear and good stability. Finger vein acquisition system based on FPGA is stable and clear, having huge market value.
Key word:
finger vein image
FPGA
collection system

Wideband spectrum sensing at low sampling rate based on the sparse Fourier transform

DOI:10.16157/j.issn.0258-7998.2015.11.024

Author:Na Meili,Zhou Zhigang,Li Peipei

Author Affilications:Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050,China

Abstract: Because the sampling rate is too high in the traditional spectrum sensing method, this paper propose a wideband signal spectrum sensing method based on the sparse Fourier transform using sub-Nyquist sampling rate. This algorithm has a very low rate of false positives when spectrum is sparse, and a modified solution is proposed even if the spectrum occupancy increases. MATLAB simulation verified the feasibility of wideband spectrum sensing scheme. Compared to the traditional method, the sampling rate that spectrum sensing based on the sparse Fourier transform required is 20% of the Nyquist sampling rate.
Key word:
wideband
spectrum sensing
sparse Fourier Transform
sub-Nyquist sampling

FDC based wideband spectrum sensing in cognitive radio

DOI:10.16157/j.issn.0258-7998.2015.11.026

Author:Chen Junchao,Wang Pingyu,Shen Bin

Author Affilications:School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065,China

Abstract: Flexible detection criterion(FDC) based wideband spectrum sensing algorithm was proposed for cognitive radio in this paper. Based on the conventional information theory criterion, the number of the primary user occupied subbands was usually underestimated. In order to solve this drawback, the Gerschgorin likelihood estimate method was improved by employing the FDC in wideband sensing. Compared with conventional energy detection scheme, the proposed scheme requires no a priori knowledge of the noise power and the PU signal. Also, the proposed scheme can adjust the flexible parameter to meet the requirements in various sensing scenarios.
Key word:
cognitive radio
wideband spectrum sensing
flexible detection criterion
Gerschgorin likelihood estimate

Available bandwidth estimation based on 802.11 RTS/CTS scheme

DOI:10.16157/j.issn.0258-7998.2015.11.027

Author:Chen Shengkai,Liu Hong,Bu Zhiyong

Author Affilications:Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China

Abstract:A novel available bandwidth estimation mechanism is proposed in this paper. Taking the channel utilization ratio into consideration in this method ensures the existing traffic in the network will not be affected by the new traffic after the estimation results are used under different requirements of QoS. So the available bandwidth estimation can truly reflect the channel available bandwidth, rather than the remaining capacity of the channel. Furthermore, this article presents two enhancements, collision probability and bandwidth consumed by backoff mechanism, to ABE. The improved method can accurately estimate the bandwidth consumed by various processes in IEEE 802.11 RTS/CTS.
Key word:
IEEE 802.11
RTS/CTS
available bandwidth estimation
QoS guarantee

The comparison of generalized frequency division multiplexing and orthogonal frequency division multiplexing

DOI:10.16157/j.issn.0258-7998.2015.11.028

Author:Sun Shangyong,Shao Kai,Qin Mengyao,Weng Haitao

Author Affilications:Chongqing University of Posts and Telecommunications,Chongqing Key Laboratory of Mobile Communication Technology, Chongqing 400065,China

Abstract:Generalized frequency division multiplexing is a kind of the physical layer solution scheme of the fifth generation mobile communication ,which was brought up by the group of 5GNOW in German. The paper first studied the basic model of GFDM, and pointed out that its essence is DFT filter bank. After that, GFDM and OFDM are both implemented by DFT filter bank, and then their features are compared, from two aspects of cyclic prefix and prototype filter, leading to a conclusion that GFDM uses less CP, improving the spectral efficiency. Lastly, the performance simulation results in MATLAB were presented, to compare the prototype filter frequency response and system SER performances, and the reasons of performance gap were given because the condition of subcarriers strictly orthogonal was given up, which increased the inter-subcarrier interference.
Key word:
generalized frequency division multiplexing
orthogonal frequency division multiplexing
prototype filter
cyclic prefix
cyclic convolution
symbol error rate

A serial min-sum algorithm for LDPC codes based on competitive scheme

DOI:10.16157/j.issn.0258-7998.2015.11.025

Author:Liang Xi1,Long Xianglin2,Zhang Enyou2,Yang Fan1

Author Affilications:1.University of Electronic Science and Technology of China, Chengdu 611731,China; 2.Ningbo Jianan Electronics Co.,Ltd,Ningbo 315000,China

Abstract: Abstract: Considering the designing costs and the power consumption issues in the decoding module, a serial min-sum algorithm for LDPC codes is proposed. The new algorithm is a type of variable-to-check message updating algorithm using normalized factor, it updates the minimum value among the variable-to-check messages based on a competitive scheme. Compared to the conventional normalized serial min-sum algorithm, it reduces the decoding complexity significantly without any performance loss. On the other hand, compared with the normalized parallel min-sum algorithm, the new approach not only reduces amount of memory, but also has some performance improvement with a little complexity increased.
Key word:
power line carrier communication
serial min-sum algorithm
low density parity check codes
iterative decoding
normalized factor

Interference load ratio based user association scheme in heterogeneous networks

DOI:10.16157/j.issn.0258-7998.2015.11.029

Author:Li Xiaolin1,2,Pei Haimin1,Fan Wenqian1

Author Affilications:1.Research Centre for Application of New Communication Technologies, Chongqing University of Posts and Telecommunications, Chongqing 400065,China; 2.Chongqing Information Technology Designing CO.,LTD,Chongqing 400065,China

Abstract: The existing algorithms in pursuit of load balancing instead of considering the interference to users, which need additional interference control strategies to improve system performance. In this paper, a new cell selection scheme is proposed, with this proposed scheme, the optimization problem of user association is modeled jointly taking the traffic load of base station and interference to users into consideration, which gives a tradeoff between loading balancing and interference mitigation. A heuristic algorithm is given to obtain a suboptimal results of the proposed scheme. Simulation results show that the proposed scheme has better performance in terms of user fairness and the average user throughput than other traditional algorithms.
Key word:
heterogeneous network
cell selection
SLNR
load balance

Power Supply Technology and Its Application

Research on islanding detection method for distributed generation grid-connected system

DOI:10.16157/j.issn.0258-7998.2015.11.030

Author:Li Yuan1,Chen Hua1,Guo Junhui1,2,Guo Hao1,3

Author Affilications:1.School of Electrical Engineering,Xinjiang University,Urumqi 830047,China; 2.Shanghai Power Transmission and Transformation Engineering Company,Shanghai 200235,China; 3.State Grid Urumqi Electric Power Supply Company,Urumqi 830011,China

Abstract:The problem of islanding is an important issue that may threat the network security of distributed generation system, so the system need to have the function of detecting islanding in time. By analyzing the conventional automatic phase shift islanding detection method, for the problem of long detection time,and it has greater impact on system power quality in DSP application environment, a fast islanding detection method based on the improved automatic phase shifting was proposed. The working principle of the improved method is analyzed, according to the relationship between current phase angle and the common point frequency when islanding adjusted the positive feedback of perturbations phase to achieve the purpose of rapid detection of islanding.And this method under certain load conditions do not exist detection blind spots. Simulation results show that the proposed algorithm is efficient and fast, and it has certain application value in engineering.
Key word:
distributed generation
grid-connected inverter
islanding detection
active phase shift

A new design of mine intrinsically safe power supply

DOI:10.16157/j.issn.0258-7998.2015.11.031

Author:Shi Jianhua1,Wang Yuqing2,Zhang Hongbin3

Author Affilications:1.HeNan Dickson Occupational health Technical Advisory Services CO.,Ltd,Zhengzhou 450042,China; 2.Mechanical and Electrical Engineering,HeNan Radio and Television University,Zhengzhou 450046,China; 3.HeNan TianDun safe production technology CO.,Ltd,Zhengzhou 450042,China

Abstract: According to the characteristics of proof and intrinsically safe power supply commonly used vibration of coal mine, introduces the basic requirements of ExibI explosion-proof and intrinsically safe power supply of the working principle, system structure and circuit design. The use of power surge suppressor chip LT4356 as the overvoltage and overcurrent protection device adopts double over-voltage and over-current protection circuit, and has the automatic recovery, undervoltage feed detection function, the output of the power supply for the dual 18 V and 1 A. In actual use, it has a reliable output and load capacity, small volume, simple assembly and debugging, simple installation etc.
Key word:
intrinsically safe
surge stopper
overvoltage and overcurrent protection circuit

The analysis of look-up table in the applications of envelope tracking chip

DOI:10.16157/j.issn.0258-7998.2015.11.032

Author:Long Wanhong1,Wu Zhenchuan2,Xu Kuanmao2,Jiang Kaixuan2

Author Affilications:1.Shanghai Advanced Research Institute of Chinese Academy of Sciences, Shanghai 201210,China; 2.School of Information Science and Technology, Shanghaitech University, Shanghai 201210,China

Abstract: As a solution for the hate problem of LTE mobile end, envelope tracking technology need a special envelope power supply chip when it applies to mobile communication system and this kind of chip’s input needs a reference envelope signal. This paper gives a so-called Fixed Gain method which combines engineering design with practical tuning. This method is mainly for generating a look-up table of envelope tracking technology. Linearity, efficiency and complexity of the system are considered in this method. This greatly improves the robustness of the system. A look-up table is created based on this method. The testing result reveals that the efficiency of a power amplifier system can be improved by 5.1% with this method and related look-up table, the output power of the power amplifier reaches 26 dBm compared with the one having the same output power but fixed bias.
Key word:
envelope tracking
envelope tracking power supply
look-up table
envelope shaping

Design of a zero-crossing detection circuit for low-power synchronous BUCK converter

DOI:10.16157/j.issn.0258-7998.2015.11.033

Author:Zhou Chaoyang,Feng Quanyuan

Author Affilications:Institute of Microelectronics,Southwest Jiaotong University,Chengdu 611756,China

Abstract:The synchronous BUCK converter will generate additional power loss caused by the reverse inductor current in the light load mode. A zero-crossing detection circuit was designed for this problem. By using two different thresholds acquisition technology,with the temperature compensation for the threshold,the current backward flowing is avoided;Edge occult circuit is also designed to avoid false triggering at switching moment.The zero-crossing detection circuit is designed based on 0.25 ?滋m BCD process,and carried on HSPICE.The simulation result shows that the negative threshold tolerance is only 0.2 mV when the system temperature various from -40 ℃ to 120 ℃,and the static power consumeption is very low.
Key word:
BUCK converter
light load mode
zero-cross detection
DCM

The algorithm for harmonic in photovoltaic power system based on the quasi-synchronous sampling

DOI:10.16157/j.issn.0258-7998.2015.11.034

Author:Xue Ping,Zhu Linlin,Wang Hongmin

Author Affilications:School of Automation,Harbin University of Science and Technology,Harbin 150080,China

Abstract: In the case of non-synchronous sampling, for defect in existing detection methods, as large amount of calculation, real-time performance,spectrum leakage and so on. This paper presents a harmonic detection algorithm based on quasi-synchronous sampling. Firstly make the asynchronous sampling sequence become quasi-synchronous. Secondly operate the quasi-synchronous sequence used the improved FFT algorithm based on Nuttall window. The algorithm is applied in PV integrated measurement device. Test results show that this algorithm can effectively eliminate the effects which frequency fluctuations and other phenomena in PV power system brought. It has a high accuracy and is good at anti-jamming capability.
Key word:
frequency fluctuation
harmonic analysis
quasi synchronous sampling
spectrum leakage
Nuttall window

Computer Technology and Its Applications

A rapid matching algorithm via image local feature

DOI:10.16157/j.issn.0258-7998.2015.11.035

Author:Zhang Gesen1,2,Chen Dongsheng1,Wang Huaiye1,Lu Zhenlin2

Author Affilications:1.Beijing Aerospace Institute of Microsystems,Beijing 100094,China; 2.Postdoctoral Workstation of China Aerospace Times Electronics Corporation,Beijing 100094,China

Abstract:In the fields of image processing and machine vision, SIFT is a widely adopted image matching algorithm based on local feature. In view of the slow speed of matching and the frequently existing of the inaccurate matching pairs, the analysis of angle similarity is presented to replace the conventional Euclidean distance analysis and improve the speed in matching process. Then, RANSAC consensus selection is performed to eliminate the inaccurate matching pairs. At last, the experimental results verify the validity of proposed algorithm. The new algorithm has the advantages of clear framework, easy calculation and being easily realized by hardware.
Key word:
image matching
local feature
SIFT
angle similarity
RANSAC

Dynamic optimization research strategy based on Xen virtual machine migration

DOI:10.16157/j.issn.0258-7998.2015.11.036

Author:Wu Jun,Zhang Yijun,Bai Guangwei

Author Affilications:College of Information Science and Engineering,Nanjing University of Technology,Nanjing 211816,China

Abstract: Although the pre-copy technology because of its millisecond application downtime and the impact on small and widely used virtual memory to the major data migration platform, but when low-bandwidth network in high-load will result in a virtual machine some of the performance of the service decline. To solve this problem, this paper will be the traditional pre-copy mechanism combined with the Markov model seeks to predict the rate of the rear wheel dirty pages using Mann-Kendall test model for the migration of dirty pages rate trends to judge, pursuant to the introduction of adaptive threshold mechanism to determine the optimal migration strategy to better address the impact of the virtual machine network bandwidth size and the level of operating loads on the traditional pre-copy technology threshold fixed stop mechanism, the experimental results show that the improved transfer mechanism can be effectively improve virtual machine live migration performance.
Key word:
Xen virtual machine
migration optimization
pre-copy
prediction model
adaptive threshold

Based on the k-wave ulrasonic field in time domain simulation

DOI:10.16157/j.issn.0258-7998.2015.11.037

Author:Li Ya1,Chen Youxing1,Ren Yangshan2,Wang Zhaoba1

Author Affilications:1.Information and Communication Engineering, North University of China, Taiyuan 030051,China; 2.Navy Maritime Security Repair Factory, Qingdao 266071,China

Abstract: Ultrasonic field simulation research is playing a very important role in the field of industrial ultrasonic flaw detection. Based on pulse principle of ultrasound detection, this paper established the simulation platform, using the k-wave toolbox on ultrasonic field, the time-domain simulation for the transmission of sound field in the cylinder workpiece internal situation. With acoustic sensor receives the echo signal, by using the interpolation reconstruction model, the research on ultrasonic field distribution inside the workpiece made reconstruction and visualization, laying a theoretical foundation for industrial production.
Key word:
k-wave
ultrasonic field
acoustic sensors
reconstruction model

Sparse imaging for ultra-wideband through-the-wall radar based on modified OMP algorithm

DOI:10.16157/j.issn.0258-7998.2015.11.038

Author:Jin Liangnian1,2,Qian Yubin2,Shen Wenting2,Liu Qi2,Zhang Yan2

Author Affilications:1.Guangxi Key Laboratory of Wideband Communication & Signal Processing,Guilin 541004,China; 2.School of Information and Communication Engineering,Guilin University of Electronic Technology,Guilin 541004,China

Abstract: Compressive sensing theory is widely applied in ultra-wideband through-the-wall radar imaging, and its performance is very good. However, the target is just falling on the preset grid point. Once the target is off the grid point, the target image will be away from the true position and the ghost will be generated. This paper proposes a Bayesian hypothesis testing orthogonal matching pursuit sparse imaging method based on gradient optimization(GBTOMP). The method is based on the conventional Orthogonal Matching Pursuit(OMP) algorithm. It searches the target true position from preset-grid-point coordinate through the steepest ascent with gradient optimization and corrects the sensing matrix in the model. Then the target scattering coefficient is reconstructed with corrected sensing matrix. Moreover, this paper uses the Bayesian hypothesis testing to set up a suitable threshold to reduce the redundancy, and guarantee the accurate recovery of the target image. The simulation and experiment results show that the proposed method can correct the model errors caused by off-grid target, effectively improve the imaging quality and is better than conventional sparse reconstruction method.
Key word:
through-the-wall radar imaging
off-the-grid
orthogonal matching pursuit
Bayesian hypothesis testing

Analysis and prediction of user behavior based on MoodCast model

DOI:10.16157/j.issn.0258-7998.2015.11.039

Author:Ma Li,Wang Yun,Yang Lin

Author Affilications:School of Computer Science, Xi′an Institute of Post and Telecommunications,Xi′an 710061,China

Abstract:Psychology research shows that human behavior is influenced by the emotion. In view of the analysis of user behavior without emotional communication mechanism in social networks, this paper presents a new model of emotion prediction based on dynamic factor graph model with the characteristics of higher prediction accuracy(MoodCast). The model was applied to predict user behavior of clicking on ads. Simulation results show that emotion is associated with social relationship and time.User behavior is positively influenced by emotion.
Key word:
emotion
emotional communication
prediction model
behavior

Research on K-coverage mechanism for 3-D wireless sensor networks

DOI:10.16157/j.issn.0258-7998.2015.11.040

Author:Wang Jun1,2,Sun Xiaoling1,Cheng Yong2

Author Affilications:1.Department of Computer & Software,Nanjing University of Information Science & Technology,Nanjing 210044,China; 2.Network Information Center,Nanjing University of Information Science & Technology,Nanjing 210044,China

Abstract: For the problem that the coverage efficiency of the sensor nodes which are randomly distributed in the three-dimensional monitoring area is low, and the critical area can not reach K-coverage. This article uses polyhedrons to fill an area,Respectively, use the deterministic coverage and random coverage to propose the best node distribution strategy, which can reach the lowest value of coverage redundancy rate and spatial density under ideal conditions. First, the monitoring area is divided into a plurality of polyhedrons, the ball diameter of a polyhedron is the sensing radius of the working sensor nodes. Then, put the sensor nodes on the vertices of a polyhedron or in the overlapping area of the polyhedrons’ circumscribed sphere. Finally, according to theory, analyze the optimum deployment of the nodes in three-dimensional sensor networks. The simulation showed that, in the case of the same coverage degree K, the coverage redundancy rate and spatial density of truncated octahedron is the lowest.
Key word:
3-D wireless sensor networks
K-coverage
truncated octahedron
reuleaux tetrahedron
coverage redundancy rate
spatial density

Stability analysis of power system consider the large-scale electric vehicle access

DOI:10.16157/j.issn.0258-7998.2015.11.041

Author:Sun Xing,Li Chunping,Jiang Nan,Luan Jingzhao

Author Affilications:State Grid Dalian Electric Power Supply Company,Dalian 116001,China

Abstract: With the constant improvement of the electric vehicle technology maturity, especially for the requirement of environmental protection is increasing, the electric car has a tendency to gradually replace fuel cars. A large number of electric cars put into use after load brings a lot of charge, the random charge and discharge behavior will bring the city new challenge to the safe and stable operation of power network, this paper uses the block decoupling dynamic simulation as a tool, to consider the large-scale electric vehicle access to the power grid stability analysis, not only can improve the accuracy of the stability analysis results,but also can obtain battery concentrated charging station optimal access plan by a priori simulation,so as to improve the stability of power grid.
Key word:
power system
electric vehicle
dynamic simulation
simulation verification

Key Technologies of 5G and Its Evolution

Key Technologies of 5G and Its Evolution

High Performance Computing

Processing and Application of Marine Target Characteristic Data

Smart Power

Antenna Technology and Its Applications

Smart Agriculture

5G-Advanced and 6G

5G Vertical Industry Application

Microelectronics in Medical and Healthcare

Key Technologies for 6G

Application of Edge Computing in IIoT

Deep Learning and Image Recognization

6G Microwave Millimeter-wave Technology

Radar Processing Technology and Evaluation

Space-Ground Integrated Technology

Industrial Ethernet Network

5G Vertical Industry Application

High Performance Computing

Innovation and Application of PKS System

FPGA and Artificial Intelligence

5G Network Construction and Optimization

RF and Microwave

Edge Computing

Network and Business Requirements for 6G

5G and Intelligent Transportation

5G R16 Core Network Evolution Technology

Satellite Nevigation Technology

5G R16 Evolution Technology

5G Wireless Network Evolution Technology

5G Network Planning Technology

5G Indoor Coverage Technology

5G MEC and Its Applications

5G Co-construction and Sharing Technology

Expert Forum

5G and Emergency Communication

5G Slicing Technology and Its Applications

Industrial Internet

5G Terminal Key Realization Technology

5G and Artificial Intelligence

5G and Internet of Vehicles

Terahertz Technology and Its Application

Signal and Information Processing

Artificial Intelligence

5G Communication

Internet of Things and the Industrial Big Data

Electronic Techniques of UAV System

Power Electronic Technology

Medical Electronics

Aerospace Electronic Technology

Robot and Industrial Automation

ADAS Technique and Its Implementation

Heterogeneous Computing

2016 IEEE International Conference on Integrated Circuits and Microsystems

ARINC859 Bus Technology

FC Network Technology

Measurement and Control Technology of Bus Network

GJB288A Bus

Key Techniques of 5G and Algorthm Implement

IEEE-1394 Bus

Signal Conditioning Technology of Sensors

AFDX Network Technology

Discrete Signal Processing

Energy-Efficient Computing

Motor control

2012 Altera Electronic Design Article Contest